Stop mechanism for fastening-inserting machines



' S. STANICK Oct. 10, 1939.

Filed Dec. 30, 1937 2 Sheets-Sheet l @il if Oct. 10, 1939.

STO? MECHANI Fig 2.

s. sTANlcK 2,175,227

SM FOR FASTENlNG-INSERTING MACHINES Filed Deo. 30, 1937 y 2 Sheets-Sheet 2 Patented ct. 10, 1939 UNITED STATES PATENT OFFICE s'roP MECHANISM Fon FASTENING- INSERTING MACHINES Application December 30, 1937, Serial No. 182,551

6 Claims.

My invention relates to fastening-inserting machines such as those used for the attachment of heels to shoes, it being particularly concerned with means for preventing the application of power to the machine at certain times in the operating cycle.

In heel-attaching machines provided with means by which nails or otherv fastenings are delivered to the inserting mechanism, there are two periods in the operating cycle during which power should not be applied to actuate said inserting mechanism. 'I'he treadle, or like controlling member, may be shifted to cause the engagement of the machine-clutch when the transferring means, as the loader-arm and its block, is in a position at which it may be struck and injured by elements movable with the inserting mechanism. Further, there might be actuation of the treadle when there was no power available for application to the machine, and the driving clutch caused to engage. In this case, when power was applied, there would be an excesssive lead, causing damage to the clutch or other portions of the driving means. An object of this invention is to guard fully against such harmful results.

In the attainment of the above object, I combine with nailing or other fastening-inserting mechanism, power mechanismV by which it is operated, together with controlling mechanism therefor and. means by which the fast'enings are transferred to the inserting mechanism, a stop member movable by the transferring means and a latch member movable by the operator, said latch member when thus moved being arranged for engagement with both the controlling mechanism and the stop member, both the stop and latch preventing actuation of the controlling mechanism. By making the stop member effective when the transferring means has left its receiving position, injury to said transferring means is avoided, while the movement of the.

treadle mechanism, a latch is movable for engagement Awith-the rod.

In the accompanying drawings,

Fig. l shows, in broken side elevation, portions of a heel-attaching machine to which my inven- 5 tion is applied;

Fig. 2 is an enlarged side elevation of elements of the treadle mechanism of the machine;

Fig. 3, a partial top plan view of the stop and latching means, and 10 Fig. 4, a detail in broken side elevation of the latching means.

The machine particularly represented in Fig. lis of the well-known McKay automatic heel loading and attaching type. In this, there is 15 reciprocable vertically upon the frame I0, a crosshead I2 carrying a die-block I4. Against this block, the jacked work is pressed for the insertion of nails resting upon drivers I6 movable in passages in the block and carried by a ver- 20 tically reciprocable plunger I8. A driving shaft 2t, journaled across the rear of the frame, is rotated from a source of power, as by a belt from a line-shaft or by'an electric motor, through a clutch indicated at 22 and which may be of the 25 Horton type. A crank 24 upon the driving shaft is joined by a connecting rod 26 and a toggle 28 to the plunger IB to eifect its reciprocation. A cam-lever 30,'osci1lated through connections 32 to the rod 26, reciprocates the crosshead I2 by 30 way of a link.3I and a toggle 33. Thus, the naildriving and Work-pressing actions are obtained. The nails are delivered to the die-block by a loader-arm 34 pivoted by a vertical pin 35 upon theframe at the' rear of the die-block and car- 35 rying at its free extremity a loader-block 36, in which the nails are transferred from nail-receiving position to a delivering position over the dieblock. The crosshead I2 has pivoted upon it for movement between the upperl face of the die- 40 l block and the plane in which the nail-transferring means moves, a swing-plate 38 by which heel-portions, asa base and top-lift, are successively presented-in operating relation. The clutch 2-2 is controlled by treadle mechanism T. 4 This consists more essentially ofafoot-lever 40, fulcrumed at 42 upon the frame and arranged for actuation b-y the operator, and a bell-cranklever L fulcrumed upon the frame by a spindle 44 above the lever 40. This lever L has a short 50 arm 46, which may be turned anticlockwise, as viewed in Fig. 1, by contact with it of the rear extremity of the lever 4U, when its foot-pad 41 is depressed. vA longer, upwardly extending arm 48 of the lever' L serves to free and cause the 55 engagement of the clutch upon anticlockwise movement and to disengage said clutch upon reverse movement under the influence of a spring 50 surrounding the spindle 44.

Mounted to turn in the frame is a vertical rod 52. At its upper end, the rod has a head 54, through which a short crank-rod 56 is slidable, this being articulated to a crank-arm 51 upon the pivot-pin 35 of the loader-arm. Upon the lower extremity of the rod is a portion 58 (Figs. 2 and 3), shown as separable but xed in position thereon by a clamping screw 60, so it is essentially a part of the rod. The top of the portion 58 has a horizontal contact-face 64. The lever L is provided with a third arm 66, extending in a generally horizontal direction, adjacent to and normally just above the rod-surface 64. 'Ihe forward end of the arm 66 is cut away at 68, and fixed to the arm by a screw passing through a slot 12 inclined to the horizontal, is a plate 14 having a lower contact-surface 18 upon an angular extension below the cut-away portion of the arm. By adjusting the plate by the slotand-screw connection, the surface 16 may be accurately located just above the plane of the rod-surface 64. Guided in a shouldered depression at the lower forward edge of the plate 14 for horizontal movement transversely of the surface 64 is a latch-bar 18. This is retained against displacement by a plate 80 screwed to the forward face of the extension of the plate 14. Its longitudinal movement is limited by a pin 82 projecting from the plate and extending into a slot 84 in the bar. It has two positions, determin-ed by a plunger 86 occupying a horizontal boreinthe plate and urged outwardly by an expansion-spring 89. The forward conical end of the plunger may enter either of two complemental depressions 90 and 92 in the latch-bar. When the plunger-end is in the depression 90, the bar is held to the right, with the left-hand end removed from above the rod-surface 64. With the plunger in the depression 92, the end of the bar is above said surface, as appears in Fig. 3.

When an operating cycle of the machine is about to be initiated, the rod-surface 64 lies at the left of the end of the lever-arm 66 and of the contact-surface 16 upon the plate 14. The operator first swings the arm 34 with a load of nails in its block 36 over the die-block I4 to deliver the nails to the driver-passages. As soon as the arm leaves its normal, nail-receiving position, the rod 52 is rotated by the connections 56, 51 anticlockwise, as viewed in Fig. 3. Ihe rodsurface 64 passes beneath the surface 16 of the treadle mechanism, so the foot-lever 48 cannot be depressed to trip the clutch 22. Were this actuation not thus prevented, elevation of the crosshead I2 under power in applying final pressure to the work would force the swing-plate 38 against the loader mechanism, causing breakage. As soon, however, as said mechanism has made itsnail-delivery and been returned to the initial position, the rod-surface A64 is withdrawn from beneath the surface 16, so the treadle mechanism is free for actuation. With the machine in use, the plunger 86 of the latch mechanism is in the depression 90, so the latch-bar 18 is wholly at the right of theA rod-surface 64 when the loader-arm 34 is in its normal nail-receiving position. As just indicated, the return of the loader-arm to normal has freed the surface 16 of the treadle mechanism from the locking surface 64; Consequently, when the operator depresses the lever 40 to cause engagement of the clutch for the initiation of a power-portion of the operating cycle, the arm 66 of the treadle mechanism is freed to descend because of engagement of the lever 40 with the arm 46, swinging out the arm 48 to release and permit the engagement of the clutch. If the operator has occasion to leave the machine when power is or is liable to be oif the shaft 20, h-e shifts the latchbar 18 to the position determined by the entrance of the plunger 86 into the depression 92. 'Ihe latch now lies above the rod-surface 64, and its engagement therewith prevents actuation of the treadle mechanism. In absence of this safeguard, depression of the foot-pad 41 by a meddlesome person when power was shut down would free the clutch, which would engage, ready for the application of power to the machine when the driving shaft again started in rotation. When this force was applied with all the driven parts at rest, the clutch or the machine might be injured, the driving belt thrown o the pulleys or fuses blown. Were the loader-arm also meddled with, the passage of the surface 64 beneath the surface 16 would lock the treadle mechanism against actuation independently of the latch-bar. The latch 18 possesses further utility for the protection of a repair man working upon the machine. While he is so engaged that its operation might injure him, he may accidentally trip the clutch or another person depress the treadle. By locking the treadle by the latch, this danger is removed, without the inconvenience of shutting down the drive.

Having described my invention, what I claim as new and desire to secure by Letters Patent ofthe United States is: Y

1. In a fastening-inserting machine, fastening-inserting mechanism, power mechanism for operating the inserting mechanism, controlling mechanism movable to cause the application of power by said power mechanism', transferring means for delivering fastenings to the inserting mechanism, a stop member movable by the transferring means to prevent actuation of the controlling mechanism, and a member movable by the operator, said member when thus moved being arranged for engagement with both the controlling mechanism and the stop member to prevent actuation of said controlling mechanism.

2. In a fastening-inserting machine, fastening-inserting mechanism, power mechanism for operating the inserting mechanism, controlling mechanism movable to cause the application of power by said power mechanism, transferring means movable between a fastening-receiving position and a position in which it delivers to the inserting mechanism, a stop member movable to prevent actuation of the controlling mechanism when the transferring means has left its nail-receiving position, and a member movable by the operator, said member when thus moved being arrangedfor engagement with both the controlling mechanism and the stop member when the transferring means is in its receiving position.

3. In a heel-attaching machine, nailing mechanism, power mechanism for' operating the nailing mechanism, treadle mechanism for controlling the power mechanism, a loader-arm movable between a nail-receiving position and a position` in which nails are delivered to the nailing mechanism, a rod rotatable by the loader-arm and having a portion movable into the path of a portion of the treadle mechanism, and a latch movable upon the treadle mechanism for engagement with the rod.

4. In a heel-attaching machine, nailing mechanism, power mechanism for operating the nailing mechanism, treadle mechanism for controlling the power mechanism, a loader-arm movable between a nail-receiving position and a position in which nails are delivered to the nailing mechanism, a rotatable rod having a portion lying in the path of a portion of the treadle mechanism when the loader-arm leaves its nail-receiving position, and a latch movable upon the treadle mechanism for engagement withthe rod when the loader-arm is in nail-receiving position.

5. In a heel-attaching machine, nailing mechanism, power mechanism for operating the nailing mechanism, treadle mechanism for controlling the power mechanism, a loader-arm movable between a nail-receiving position and a position in which nails are delivered to the nailing mechanism, a rod rotatable by the loader-arm', and a latch movable upon the treadle mechanism into and out of position to engage the rod.

6. In a heel-attaching machine, nailing mechanism, power mechanism for operating the nailing mechanism, treadle mechanism for controlling the power mechanism, said treadle mechanism having a contact-portion adjustable thereon, a loader-arm movable between a nailreceiving position and a position in which nails are delivered to the nailing mechanism, a rod rotatable by the loader-arm and having a contact-portion movable into the path of the contact-portion of the treadle mechanism, and a latch movable upon the treadle mechanism and provided with means for determining two positions thereon, one in which it is freed from engagement with the contact-portion of the rod and one in which it is arranged for engagement with said rod-portion when the loader-arm is in its nail-receiving position and the rod-portion is out of engaging relation to the contact-portion of the treadle.

SAMUEL STANICK. 

